Pipe-cutter.



W. H. JOHNSON.

PIPE CUTTER.

APPLICATION FILED APRA, 191a. mmnwnn APR.16,1914.

Patented Nov. 24, 1914.

HIE NORRIS PETERS Ca. PHDTO-LITHO WAS-HINUIOH, n, t

WILLIE H. JOHNSON, OF WACO, TEXAS.

PIPE-CUTTER.

Specification of Letters Patent.

Patented Nov. 24,1914.

Application filed April 4, 1913, Serial No. 758,798. Renewed April 16, 1914. Serial No. 832,381.

To all whom it may concern:

Be it known that I, lVILLIE H. JOHNSON, a citizen of the United States, and a resident of aco, in the county of McLennan and State of Texas, have made a new and useful ln'iproveinent in Pipe-Cutters, of which. the following is a specification.

My invention is an improvement in pipe cutters, and llttSClOl its object the provision of a simple, easily operated device of the character specified, by means of which a portion of the material of the pipe is removed to form the cut, instead of theinaterial being displaced and wedged apart without removing as is the case with the commonly used cutter.

In the drawings :-Figure 1 is a side view of the improved cutter, Fig. 2 is a front view, Fig. 3 is a side view of the blade support, Fig. 4L is a top plan view of the said support, Fig. 5 is a side view of one of the rollers, Fig. 6 is a view of the blade carrier and connected mechanism detached, Fig. 7 is a plan view of the hand wheel, Fig. 8 is a side view of the cutting blade, Fig. 9 is an edge view of the same, and Fig. 10 is an edge view of amodified form of rotary cutter.

The present embodiment of the invention comprises a support consisting of a bar 1,

having at each end a lateral extension 2 and v 3 respectively, and the said support is of T cross section as shown, and is provided at the inner edge of the bar 1 with laterally extending ribs, 4, the said ribs forming 'guideways for the carriage to be later described. The extension 2 is provided with an internally threaded bearing 5, and a rod 6 is threaded through the bearing, the rod having at its upper end a handle 7. i

The extension 3 is recessed at its front end as shown to form spaced bearing arms 8, andeach arm is provided with a bearing 9, at its upper edge. A cutter wheel or disk 10 is supported in the recess, the shaft 11 which supports the disk having its ends received in the bearings 9, and the said disk is provided with a hub 12, extending on each side of the disk, the ends of the hubs engaging the inner faces of'the arms 9 to properly space thedisk between the hearing. It will be notedthat the cutter wheel or disk 10 has a cylindrical peripheral or working surface.

The cutter blade 13" is provided with a transverse opening 14, at its upper end and 14 of the blade and through the lower end ofthe holder, and the ends of the blade are received .in oppositely arranged vertically extending slots 18 in the blade carriage 19, the threaded ends of the bolt being reduced and engaged by nuts 20 to prevent lateral movement of the bolt. The nuts 20 loosely engage outside of the blade carriage, and the said carriage is provided with guide arms 21 and 22 respectively, each of the said arms being grooved or recessed on its inner face to engage the adjacent rib ,4- of the support. The carriage is thus slidable vertically on the support and the said ribs 4 are cut away at their lower ends as indicated at 21 and 22 to permit the disengagement of the guide arms 21. and 22, the said cut away portions or recesses in the ribs bcingof a length suilicient to permit the disengagement of the said arms.

The lower side of the blade carriage is provided with an arc-shaped recess 23, and a plurality of sets of rollers is journaled in the carriage at the recess. Each of the said sleeve 24 and annular ribs 25 at the ends of the sleeve, the said ribs being integral with the sleeve and each sleeve is journalcd on a shaft 26, the shafts being supported in bearings27 in thecarriage at the recess 23. The rollers are so arranged that a portion of the periphery of each sleeve and of each rib extends into the recess to engage the pipe 27, to be cut.

The blade-holder 16, before mentioned, is slidablc in a sleeve 28,'the said sleeve extending upwardly from the carriage 19, and the recess of the holder is engaged by a threaded stem 29, having at its Supper end a socket 30, the said socket having its upper edge toothed as indicated at 31, and a hand wheel 32 is secured to the stem between the socket and the stem proper. An annular groove 33 is provided inqthe stern between the threaded portion and the wheel 32 and the .saiclgroove. is engaged by the inner end of a set screw 34, threaded through the sleeve 28 and engaging the groove The stem is thus prevented from movement lon. gitudinally of the sleeve 28, while at the same time the said stem may rotate freely with respect to thesleeve to raise or lower the blade holder 16. The lower end of the threaded rod 6 before mentioned, is conical as indicated in dotted lines in Fig. 6, and the said end isprovided with an annular groove 35 just above the conical portion. The said lower end of the rod fits within the socket '30 and a set screw 36 is threaded through the socket,the inner end thereof engaging the groove to prevent longitudinal movement of the rod 6 with respect to the socket and the stem 29, but to permit the said rod 6 to rotate freely with respect to the socket. A collar 37 encircles the rod 6 just above the socket 30 and the said collar '37 is provided at its lower end with one or more teeth 38. The collar is'slotted longitudinally as indicated at 39, and a pin 40 extends radially from the rod 6 into the slot to limit the longitudinal movement of the collar on the rod. The pin and slot connection permits the collar 37 to be moved longitudinally of the said rod 6 a sufficient distance to permit the disengagement of the tooth 38 from the teeth '31 and the said collar 37 is held in adjusted position on the rod 6 by means of a set screw 41, the said set screw being threaded through'the collar and being adapted to engage the rod 6.

The lower end f'the blade 13 is held by the support shown more particularly in Figs.f3 and 4 and comprising a sleeve 42 and collars 43, the said collars being arranged coaxially and parallel with the sleeve and each collar is connected to the sleeve by means of a radial arm'44, the said arms e1:- tending parallel and in spaced relation to a point adjacent to the sleeve where they oin as indicated at 45. The blade extends through the recess 46 between the arms and the rear edge of the blade engages the integral connection 45 of the arms;

The sleeve '42- 'is arranged within the car riage between the opposite side walls thereof and a pin 47 'is passed throu h the said side walls and the sleeve to hold the sleeve in place. A pin 48 is passed through the side walls of the carriage and the collar-s 43 to support the collars. The rollers 24- 25 mentioned, are arranged 'in'pairs, one of the pairs being at the ends of the arc out-lin ing the recess 23, while the other pair are arranged approximately half way'loetween the center of the recess and the adjacent end; The rollers are thus arranged in such man ner that they mav engage pipes 'of various d ameter as ind cated in dotted lines in F g. 1. The largest size pinefwill b'ei 'engaged by the lower-mostpairs -'of"rollers, and the smallest by the upper;-' rn'ost.;:pain,

while an intermediate size may engage both pairs of rollers.

The cutting blade 13 is adjusted toward and from the pipe 27 in the following man ner. to permit the collar 37 to be lifted to disengage the teeth 38 from the teeth 31. The collar is lifted into the dotted-line position of Fig. 1, and the set screw is again tightened to hold the said'collar in lifted position. The socket 30 may now be turned to raise or lower the holder 16. The stem 29 in connection with the said socket is-threaded in the opposite direction to the rod 6, the rod 6 being a right-hand while the stem 9 is a left-hand thread. -When the socket 30 is turned-in one direction, the holder 16 is lifted, while when the socket is turned in the opposite direction, the holder is lowered. When it is desired to cut pipe, the set screw 41 is released, and the collar 37 moved upwardly away from the sleeve 28. The blade carriage is then moved toward or from the disk cutter 10, to engage the pipe between the said disk cutter and the blade carriage. Afterthe carriage has beenengaged closely with the pipe, clasping the pipe between the carriage and the disk cutter 10, the blade is adjusted into contact with thepipe "by turning the hand wheel 32 in the proper direction. The blade having engaged the pipe, the collar 37 is clutched to the sleeve 28 and the set screw 41 is tightened. The

The thumb screw 41 is first loosened support is now rotated 'on the pipe, and at the end of each complete revolution of the cutter, the rod '6 is turned 'by means of the handle 7 to move the blade toward the pipe. Whenever the rod 6 is turned with thecollar 37 clutched to the socket 30, the said socket 30 'is also turned, turning the threaded stem '29. Thus as the cutter blade is forced toward the pipe, the 'diskcutter I0 is also moved toward the pipe and the bla de,

and the disk cutter travel toward each other at the same rate of speed. The movement of the said elements namely, the blade 13 and the cutter 10 is uniform, each movement 'of the blade 13 being accompanied by anequal movement of the :cutter 10 with respectzto the pipe being cut.

Thewhee'lor disk 10 is of the same thickness as the thickness of the cutter blade 13, and the'two edges 'of the "said di sk :or wheel roll or cut down the side walls of the groove 49 fo med by the cutting blade The said disk or wheel thus maintains the angle formed between the side walls and the "bottom of the groove 49 sharp and clearlv defined, thus relieving the corners 50 of the 5 said strainbein'g at the angles 5.0. and with the usualxfqr n :of cutter, gfthe Jlilifijdlfi; requires frequent regrinding on this account, the said corners being worn away or broken off. By the use of the disk or wheel, this strain is taken off the blade, the sharp edges or angles of the said disk or wheel rolling down or cutting down the side walls of the cut, and making a sharp angle between each side wall and the bottom of the cut.

The nutsQO jam on the bolt 17, in order to permit the bolt to move freely in the slots 18. The said nuts do not tighten against the sides of the sleeve 28. In the construction of Fig. 10, a modified form of rotating cutter is shown, the said cutter having a hub 51, corresponding to the hub 12 of the disk 10, and the periphery of the cutter 52 is grooved annularly as indicated at 53, to form two cutting edges 54, the said cutting edges being parallel with each other, and the said disk cutter is of the same thickness as the cutting blade with which it cooperates. The construction of Fig. 10 operates in precisely the same manner as the disk cutter 10, and this construction of cutter forms the subject-matter of my prior Patent, #1.,064555, granted June 10, 1913, on an application bearing Serial 683,321, filed March 12, 1912. In both constructions, the disk cutter or cutter wheel has two cutting edges, parallel with each other, and spaced apart late ally. In the construction of wheel 10, the said cutting edges are formed between the side faces of the wheel and the peripheral surface thereof, while in the construction of Fig. 1.0, the periphery is grooved or cut away between the said cutting edges. Both wheels however, cut in the same manner, and perform precisely the same function in the cutting of the pipe.

The cutter wheel, shown in Figs. 1 and 2, is especially adapted to cut in a groove already formed, the angle or edge formed bv the peripheral surface and the side faces thereof at the periphery of the wheel acting to cut and roll down the side walls of the groove to make a groove having its side walls perpendicular to its bottom. The cutter is of any suitable material.

I claim 1. A pipecutter comprising a support having at one end thereof a lateral extension, a cutter wheel journaled in the extension, the periphery of the wheel being at right angles to the sides thereof, a cutter carriage having an arc-shaped recess on the side adjacent to the wheel, a blade holder supported by the carriage at approximately the center of the recess, a blade in the holder, said blade having a thickness approximately equal to the width of the wheel, pairs of rollers journaled on the carriage. the peripheries of each pair of rollers extending into the recess for engaging the pipe, the pairs being arranged to engage different sizes of pipe on opposite sides of the blade, and means for feeding the carriage.

2. A pipe-cutter comprising a support having at one end thereof a cutter wheel for engaging the pipe to be cut, a blade carriage mounted to slide on the support toward and from the wheel, said carriage having an arc-shaped recess on the side adjacent to the wheel, a blade-holder supported by the carriage at approximately the center of the recess, a blade in the holder, pairs of rollers journaled on the carriage, the peripheries of each pair of rollers extending into the recess for engag ing the pipe, means in connection with the 1 support for feeding the carriage toward and from the wheel, and a deta chable connection between the carriage and the feeding means.

A pipe cutter comprising a support having at each end a lateralcxtension, a cutter wheel journaled in one extension for cni gaging the pipe to be cut, a rod threaded tl'irol'igh the other extension, a blade-holding carriage mounted to slide on the support toward and from the wheel. a blade holder in the carriage, a plurality of pairs of rollers iournaled in the carriage for engaging different sizes of pipe, a blade in the holder. and a detachable connection between the rod and the carriage for feeding the said carriage and blade.

4. A pipe cutter comprising a supporthaving at each end a lateral extension, a cutter wheel journaled in one extension for engaging the pipe to be cut, a blade holding, carriage mounted to slide on the support toward and from the wheel. means in connection with the other extension for feeding the carriage, a blade holder supported by the carriage and comprising a sleeve ar ranged transversely of the carriage and having arms extending laterally therefrom, a collar at the free end of each arm, said collars being coaxial, pins engaging the carriage and traversing the collars and the sleeve, said arms beina' spaced to receive the blade. and a cutting blade supported by the holder.

5. A pipe cutter comprising a support, a cutter wheel journaled on the support at one end thereof, a carriage slidable on the support toward and from the wheel, a blade mounted in the carriage, means for adjusting the blade toward and from the wheel with respect to the carriage, and means for feeding the carriage, said blade and wheel being of equal thickness.

6. A pipe cutter comprising a support. a cutter wheel journalcd at one end of the support, a carriage movable on the support toward and from the wheel. a blade supported by the carriage and adjustable with respect thereto. and means for feeding the carriage, said blade and wheel engaging the i pipe at diametrically opposite points and being of equal thickness.

7. In a pipe cutter, a cutting blade having its Working end inclined, a cutting disk having a cylindrical peripheral or Working surface, the blade and the disk having the same thickness, and said Wheel being adapted to roll down the corners between the bot tom and the side Walls of the groove formed by the blade, a carriage for supporting the blade, a support on which the carriage is slidable, the Wheel being journaled on the support, said blade being adjustable With respect to the carriage, and means for feeding the carriage.

8. In a pipe cutter, a cutting blade having one of its ends inclined, a cutter Wheel having its peripheral surface at right angles to its side Walls, the blade and the Wheel having the same thickness, and said Wheel being adapted to roll down the corners between the bottom and the side Walls of the groove formed by the blade.

9. In a pipe cutter, a support, a cutting blade and a cutter Wheel mounted on the support, the blade being mounted to cut in advance of the Wheel, said blade and Wheel being of equal thickness and the Wheel havifng a cylindrical peripheral or Working surace.

1,1 iaeea 10. In a pipe cutter, a support, a cutter wheel jonrnaled on the support, a cutting blade mounted for movement on the support toward and from the Wheel, said blade having a cylindrical peripheral or Working surface and being otthe same thickness as the blade and arranged to cut behind the blade in the groove formed by the blade.

11. T11 a pipe cutter, a cutter Wheel having a cylindrical peripheral or Working surface, a cutting blade of the same thickness as the Wheel, and means for supporting the blade and the Wheel in the same plane, the wheel being journaled for rotation on the supporting means, and the blade being adjustable on the supporting means toward and from the Wheel.

12. In a pipe cutter,a cutting blade having its Working end inclined and a cutter Wheel having a cutting edge at the junction between the side Walls and the peripheral surface thereof, said Wheel being of the same thickness as the blade, and means for supporting the blade and the wheel to engage the pipe in succession in the same circumferential line.

, WILLIE H. JOHNSON.

Witnesses C. E. THAINOR, SoLoN G. KnMoN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latents.

Washington. D. C. 

